lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp

   1 //===-- HexagonMCTargetDesc.cpp - Hexagon Target Descriptions -------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file provides Hexagon specific target descriptions.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "HexagonMCAsmInfo.h"
  15 #include "HexagonMCELFStreamer.h"
  16 #include "HexagonMCTargetDesc.h"
  17 #include "MCTargetDesc/HexagonInstPrinter.h"
  18 #include "llvm/MC/MCCodeGenInfo.h"
  19 #include "llvm/MC/MCContext.h"
  20 #include "llvm/MC/MCELFStreamer.h"
  21 #include "llvm/MC/MCInstrInfo.h"
  22 #include "llvm/MC/MCObjectStreamer.h"
  23 #include "llvm/MC/MCRegisterInfo.h"
  24 #include "llvm/MC/MCStreamer.h"
  25 #include "llvm/MC/MCSubtargetInfo.h"
  26 #include "llvm/MC/MachineLocation.h"
  27 #include "llvm/Support/ELF.h"
  28 #include "llvm/Support/ErrorHandling.h"
  29 #include "llvm/Support/TargetRegistry.h"
  30
  31 using namespace llvm;
  32
  33 #define GET_INSTRINFO_MC_DESC
  34 #include "HexagonGenInstrInfo.inc"
  35
  36 #define GET_SUBTARGETINFO_MC_DESC
  37 #include "HexagonGenSubtargetInfo.inc"
  38
  39 #define GET_REGINFO_MC_DESC
  40 #include "HexagonGenRegisterInfo.inc"
  41
  42 MCInstrInfo *llvm::createHexagonMCInstrInfo() {
  43   MCInstrInfo *X = new MCInstrInfo();
  44   InitHexagonMCInstrInfo(X);
  45   return X;
  46 }
  47
  48 static MCRegisterInfo *createHexagonMCRegisterInfo(StringRef TT) {
  49   MCRegisterInfo *X = new MCRegisterInfo();
  50   InitHexagonMCRegisterInfo(X, Hexagon::R0);
  51   return X;
  52 }
  53
  54 static MCSubtargetInfo *
  55 createHexagonMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
  56   MCSubtargetInfo *X = new MCSubtargetInfo();
  57   InitHexagonMCSubtargetInfo(X, TT, CPU, FS);
  58   return X;
  59 }
  60
  61 namespace {
  62 class HexagonTargetELFStreamer : public HexagonTargetStreamer {
  63 public:
  64   MCELFStreamer &getStreamer() {
  65     return static_cast<MCELFStreamer &>(Streamer);
  66   }
  67   HexagonTargetELFStreamer(MCStreamer &S, MCSubtargetInfo const &STI)
  68       : HexagonTargetStreamer(S) {
  69     auto Bits = STI.getFeatureBits();
  70     unsigned Flags;
  71     if (Bits.to_ullong() & llvm::Hexagon::ArchV5)
  72       Flags = ELF::EF_HEXAGON_MACH_V5;
  73     else
  74       Flags = ELF::EF_HEXAGON_MACH_V4;
  75     getStreamer().getAssembler().setELFHeaderEFlags(Flags);
  76   }
  77   void EmitCommonSymbolSorted(MCSymbol *Symbol, uint64_t Size,
  78                               unsigned ByteAlignment,
  79                               unsigned AccessSize) override {
  80     HexagonMCELFStreamer &HexagonELFStreamer =
  81         static_cast<HexagonMCELFStreamer &>(getStreamer());
  82     HexagonELFStreamer.HexagonMCEmitCommonSymbol(Symbol, Size, ByteAlignment,
  83                                                  AccessSize);
  84   }
  85   void EmitLocalCommonSymbolSorted(MCSymbol *Symbol, uint64_t Size,
  86                                    unsigned ByteAlignment,
  87                                    unsigned AccessSize) override {
  88     HexagonMCELFStreamer &HexagonELFStreamer =
  89         static_cast<HexagonMCELFStreamer &>(getStreamer());
  90     HexagonELFStreamer.HexagonMCEmitLocalCommonSymbol(
  91         Symbol, Size, ByteAlignment, AccessSize);
  92   }
  93 };
  94 }
  95
  96 static MCAsmInfo *createHexagonMCAsmInfo(const MCRegisterInfo &MRI,
  97                                          const Triple &TT) {
  98   MCAsmInfo *MAI = new HexagonMCAsmInfo(TT);
  99
 100   // VirtualFP = (R30 + #0).
 101   MCCFIInstruction Inst =
 102       MCCFIInstruction::createDefCfa(nullptr, Hexagon::R30, 0);
 103   MAI->addInitialFrameState(Inst);
 104
 105   return MAI;
 106 }
 107
 108 static MCCodeGenInfo *createHexagonMCCodeGenInfo(StringRef TT, Reloc::Model RM,
 109                                                  CodeModel::Model CM,
 110                                                  CodeGenOpt::Level OL) {
 111   MCCodeGenInfo *X = new MCCodeGenInfo();
 112   // For the time being, use static relocations, since there's really no
 113   // support for PIC yet.
 114   X->initMCCodeGenInfo(Reloc::Static, CM, OL);
 115   return X;
 116 }
 117
 118 static MCInstPrinter *createHexagonMCInstPrinter(const Triple &T,
 119                                                  unsigned SyntaxVariant,
 120                                                  const MCAsmInfo &MAI,
 121                                                  const MCInstrInfo &MII,
 122                                                  const MCRegisterInfo &MRI) {
 123   if (SyntaxVariant == 0)
 124     return (new HexagonInstPrinter(MAI, MII, MRI));
 125   else
 126     return nullptr;
 127 }
 128
 129 static MCStreamer *createMCStreamer(Triple const &T, MCContext &Context,
 130                                     MCAsmBackend &MAB, raw_pwrite_stream &OS,
 131                                     MCCodeEmitter *Emitter, bool RelaxAll) {
 132   return createHexagonELFStreamer(Context, MAB, OS, Emitter);
 133 }
 134
 135 static MCTargetStreamer *
 136 createHexagonObjectTargetStreamer(MCStreamer &S, MCSubtargetInfo const &STI) {
 137   return new HexagonTargetELFStreamer(S, STI);
 138 }
 139
 140 // Force static initialization.
 141 extern "C" void LLVMInitializeHexagonTargetMC() {
 142   // Register the MC asm info.
 143   RegisterMCAsmInfoFn X(TheHexagonTarget, createHexagonMCAsmInfo);
 144
 145   // Register the MC codegen info.
 146   TargetRegistry::RegisterMCCodeGenInfo(TheHexagonTarget,
 147                                         createHexagonMCCodeGenInfo);
 148
 149   // Register the MC instruction info.
 150   TargetRegistry::RegisterMCInstrInfo(TheHexagonTarget,
 151                                       createHexagonMCInstrInfo);
 152
 153   // Register the MC register info.
 154   TargetRegistry::RegisterMCRegInfo(TheHexagonTarget,
 155                                     createHexagonMCRegisterInfo);
 156
 157   // Register the MC subtarget info.
 158   TargetRegistry::RegisterMCSubtargetInfo(TheHexagonTarget,
 159                                           createHexagonMCSubtargetInfo);
 160
 161   // Register the MC Code Emitter
 162   TargetRegistry::RegisterMCCodeEmitter(TheHexagonTarget,
 163                                         createHexagonMCCodeEmitter);
 164
 165   // Register the asm backend
 166   TargetRegistry::RegisterMCAsmBackend(TheHexagonTarget,
 167                                        createHexagonAsmBackend);
 168
 169   // Register the obj streamer
 170   TargetRegistry::RegisterELFStreamer(TheHexagonTarget, createMCStreamer);
 171
 172   // Register the MC Inst Printer
 173   TargetRegistry::RegisterMCInstPrinter(TheHexagonTarget,
 174                                         createHexagonMCInstPrinter);
 175
 176   TargetRegistry::RegisterObjectTargetStreamer(
 177       TheHexagonTarget, createHexagonObjectTargetStreamer);
 178 }